Re: TC issues. IGNITE-3084. Spark Data Frame API

Николай Ижиков Thu, 30 Nov 2017 11:43:54 -0800

Valentin,

Thank you, but your changes does not enough


I ran a build for my branch and still has "Unsupport major.minor version 52.0" 
issue [1]

Build log:

`Starting: /usr/lib/jvm/java-7-oracle/bin/java 
-DJAVA_HOME=/usr/lib/jvm/java-8-oracle`

I look to build settings and found some variables that sill points to jdk7:

Environment variables:

env.JAVA_HOME   /usr/lib/jvm/java-7-oracle
env.JDK_HOME    /usr/lib/jvm/java-7-oracle

Can you, please, change this variables too?

[1] 
https://ci.ignite.apache.org/viewLog.html?buildId=970913&buildTypeId=Ignite20Tests_IgniteRdd&tab=buildLog


30.11.2017 22:16, Valentin Kulichenko пишет:

Nikolay,

Java 7 support will be dropped by Ignite soon, so let's do the upgrade now. I changed both 'Ignite RDD' and 'Ignite RDD spark 2_10' configuration on TC to use JDK 8. Can you try it out and let me knowif it works?


-Val

On Wed, Nov 29, 2017 at 11:28 PM, Николай Ижиков <nizhikov....@gmail.com 
<mailto:nizhikov....@gmail.com>> wrote:

    Valentin,

    > Oh, so this is because of upgrade to 2.2.0?

    Yes, we should upgrade spark module to jdk1.8 because switching to spark 
2.2.0.

    > least we should consider not dropping previous version yet.

    Please, note, we can have IgniteRDD and Ignite Data Frame for a spark 2.1.

    The only thing we can't have is IgniteCatalog.

    Currently, in my PR I include IgniteRDD and Ignite Data Frame in spark_2.10 
module
    So we doesn't have to drop spark 2.1 completely.

    https://github.com/apache/ignite/pull/2742 
<https://github.com/apache/ignite/pull/2742>

    30.11.2017 02:09, Valentin Kulichenko пишет:

        Nikolay,

        Oh, so this is because of upgrade to 2.2.0? Then I'm not sure we should 
upgrade in the first place, or at least we should consider not dropping 
previous version yet. I sent a message to the
        original thread about upgrade, let's decide there and then come back to 
this issue.

        -Val

        On Tue, Nov 28, 2017 at 8:08 PM, Николай Ижиков <nizhikov....@gmail.com 
<mailto:nizhikov....@gmail.com> <mailto:nizhikov....@gmail.com 
<mailto:nizhikov....@gmail.com>>> wrote:

             Valentin,

             For now `Ignite RDD` build runs on jdk1.7.
             We need to update it to jdk1.8.

             I wrote the whole versions numbers to be clear:

             1. Current master - Spark version is 2.1.0.
                      So both `Ignite RDD` and `Ignite RDD 2.10` runs OK on 
jdk1.7.

             2. My branch -
                      `Ignite RDD 2.10` - spark version is 2.1.2 - runs OK on 
jdk1.7.
                      `Ignite RDD` - spark version 2.2.0 - fails on jdk1.7, 
*has to be changed to run on jdk1.8*


             29.11.2017 03:27, Valentin Kulichenko пишет:

                 Nikolay,

                 If Spark requires Java 8, then I guess we have no choice. How 
TC is configured at the moment? My understanding is that Spark related suites 
are successfully executed there, so is
        there an issue?

                 -Val

                 On Tue, Nov 28, 2017 at 2:42 AM, Николай Ижиков <nizhikov....@gmail.com 
<mailto:nizhikov....@gmail.com> <mailto:nizhikov....@gmail.com 
<mailto:nizhikov....@gmail.com>>
        <mailto:nizhikov....@gmail.com <mailto:nizhikov....@gmail.com> 
<mailto:nizhikov....@gmail.com <mailto:nizhikov....@gmail.com>>>> wrote:

                      Hello, Valentin.

                          Added '-Dscala-2.10' to the build config. Let me know 
if it helps.


                      Yes, it helps. Thank you!
                      Now, 'Ignite RDD spark 2_10' succeed for my branch.


                          Do you mean that IgniteRDD does not compile on JDK7? 
If yes, do we know the reason? I don't think switching it to JDK8 is a solution 
as it should work with both.


                      I mean that latest version of spark doesn't support jdk7.

        http://spark.apache.org/docs/latest/ <http://spark.apache.org/docs/latest/> 
<http://spark.apache.org/docs/latest/ <http://spark.apache.org/docs/latest/>> 
<http://spark.apache.org/docs/latest/
        <http://spark.apache.org/docs/latest/> <http://spark.apache.org/docs/latest/ 
<http://spark.apache.org/docs/latest/>>>

                      "Spark runs on Java 8+..."
                      "For the Scala API, Spark 2.2.0 uses Scala 2.11..."
                      "Note that support for Java 7... were removed as of Spark 
2.2.0"
                      "Note that support for Scala 2.10 is deprecated..."

                      Moreover, We can't have IgniteCatalog for spark 2.1.
                      Please, see my explanation in jira ticket -

        
https://issues.apache.org/jira/browse/IGNITE-3084?focusedCommentId=16268523&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-16268523
        
<https://issues.apache.org/jira/browse/IGNITE-3084?focusedCommentId=16268523&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-16268523>
                 
<https://issues.apache.org/jira/browse/IGNITE-3084?focusedCommentId=16268523&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-16268523
        
<https://issues.apache.org/jira/browse/IGNITE-3084?focusedCommentId=16268523&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-16268523>>
                      
<https://issues.apache.org/jira/browse/IGNITE-3084?focusedCommentId=16268523&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-16268523
        
<https://issues.apache.org/jira/browse/IGNITE-3084?focusedCommentId=16268523&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-16268523>
                 
<https://issues.apache.org/jira/browse/IGNITE-3084?focusedCommentId=16268523&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-16268523
        
<https://issues.apache.org/jira/browse/IGNITE-3084?focusedCommentId=16268523&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-16268523>>>

                      Do you see any options to support jdk7 for spark module?

                      > I think all tests should be executed on TC. Can you 
check if they work and add them to corresponding suites

                      OK, I file a ticket and try to fix it shortly.

        https://issues.apache.org/jira/browse/IGNITE-7042 
<https://issues.apache.org/jira/browse/IGNITE-7042> 
<https://issues.apache.org/jira/browse/IGNITE-7042
        <https://issues.apache.org/jira/browse/IGNITE-7042>> 
<https://issues.apache.org/jira/browse/IGNITE-7042 
<https://issues.apache.org/jira/browse/IGNITE-7042>
                 <https://issues.apache.org/jira/browse/IGNITE-7042 
<https://issues.apache.org/jira/browse/IGNITE-7042>>>

                      28.11.2017 03:33, Valentin Kulichenko пишет:

                          Hi Nikolay,

                          Please see my responses inline.

                          -Val

                          On Fri, Nov 24, 2017 at 2:55 AM, Николай Ижиков <nizhikov....@gmail.com 
<mailto:nizhikov....@gmail.com> <mailto:nizhikov....@gmail.com 
<mailto:nizhikov....@gmail.com>>
        <mailto:nizhikov....@gmail.com <mailto:nizhikov....@gmail.com> 
<mailto:nizhikov....@gmail.com <mailto:nizhikov....@gmail.com>>>
                 <mailto:nizhikov....@gmail.com <mailto:nizhikov....@gmail.com> 
<mailto:nizhikov....@gmail.com <mailto:nizhikov....@gmail.com>> 
<mailto:nizhikov....@gmail.com
        <mailto:nizhikov....@gmail.com> <mailto:nizhikov....@gmail.com 
<mailto:nizhikov....@gmail.com>>>>> wrote:

                               Hello, guys.

                               I have some issues on TC with my PR [1] for 
IGNITE-3084(Spark Data Frame API).
                               Can you, please, help me:


                               1. `Ignite RDD spark 2_10` -

                               Currently this build runs with following 
profiles: `-Plgpl,examples,scala-2.10,-clean-libs,-release` [2]
                               That means `scala` profile is activated too for 
`Ignite RDD spark 2_10`
                               Because `scala` activation is done like [3]:

                               ```
                                            <activation>
                                                
<property><name>!scala-2.10</name></property>
                                            </activation>
                               ```

                               I think it a misconfiguration because 
scala(2.11) shouldn't be activated for 2.10 build.
                               Am I miss something?

                               Can someone edit build property?
                                        * Add `-scala` to profiles list
                                        * Or add `-Dscala-2.10` to jvm 
properties to turn off `scala` profile in this build.


                          Added '-Dscala-2.10' to the build config. Let me know 
if it helps.


                               2. `Ignite RDD` -

                               Currently this build run on jvm7 [4].
                               As I wrote in my previous mail [5] current 
version of spark(2.2) runs only on jvm8.

                               Can someone edit build property to run it on 
jvm8?


                          Do you mean that IgniteRDD does not compile on JDK7? 
If yes, do we know the reason? I don't think switching it to JDK8 is a solution 
as it should work with both.


                               3. For now `Ignite RDD` and `Ignite RDD spark 
2_10` only runs java tests [6] existing in `spark` module.
                               There are several existing tests written in 
scala(i.e. scala-test) ignored in TC. IgniteRDDSpec [7] for example.
                               Is it turned off by a purpose or I miss 
something?
                               Should we run scala-test for spark and 
spark_2.10 modules?

                          I think all tests should be executed on TC. Can you 
check if they work and add them to corresponding suites?


                               [1] https://github.com/apache/ignite/pull/2742 
<https://github.com/apache/ignite/pull/2742> 
<https://github.com/apache/ignite/pull/2742
        <https://github.com/apache/ignite/pull/2742>> 
<https://github.com/apache/ignite/pull/2742 <https://github.com/apache/ignite/pull/2742>
                 <https://github.com/apache/ignite/pull/2742 
<https://github.com/apache/ignite/pull/2742>>> 
<https://github.com/apache/ignite/pull/2742 <https://github.com/apache/ignite/pull/2742>
        <https://github.com/apache/ignite/pull/2742 
<https://github.com/apache/ignite/pull/2742>> 
<https://github.com/apache/ignite/pull/2742 <https://github.com/apache/ignite/pull/2742>
                 <https://github.com/apache/ignite/pull/2742 
<https://github.com/apache/ignite/pull/2742>>>>
                               [2] 
https://ci.ignite.apache.org/viewLog.html?buildId=960220&buildTypeId=Ignite20Tests_IgniteRddSpark210&tab=buildLog&_focus=379#_state=371
        
<https://ci.ignite.apache.org/viewLog.html?buildId=960220&buildTypeId=Ignite20Tests_IgniteRddSpark210&tab=buildLog&_focus=379#_state=371>
                 
<https://ci.ignite.apache.org/viewLog.html?buildId=960220&buildTypeId=Ignite20Tests_IgniteRddSpark210&tab=buildLog&_focus=379#_state=371
        
<https://ci.ignite.apache.org/viewLog.html?buildId=960220&buildTypeId=Ignite20Tests_IgniteRddSpark210&tab=buildLog&_focus=379#_state=371>>
                          
<https://ci.ignite.apache.org/viewLog.html?buildId=960220&buildTypeId=Ignite20Tests_IgniteRddSpark210&tab=buildLog&_focus=379#_state=371
        
<https://ci.ignite.apache.org/viewLog.html?buildId=960220&buildTypeId=Ignite20Tests_IgniteRddSpark210&tab=buildLog&_focus=379#_state=371>
                 
<https://ci.ignite.apache.org/viewLog.html?buildId=960220&buildTypeId=Ignite20Tests_IgniteRddSpark210&tab=buildLog&_focus=379#_state=371
        
<https://ci.ignite.apache.org/viewLog.html?buildId=960220&buildTypeId=Ignite20Tests_IgniteRddSpark210&tab=buildLog&_focus=379#_state=371>>>
                               
<https://ci.ignite.apache.org/viewLog.html?buildId=960220&buildTypeId=Ignite20Tests_IgniteRddSpark210&tab=buildLog&_focus=379#_state=371
        
<https://ci.ignite.apache.org/viewLog.html?buildId=960220&buildTypeId=Ignite20Tests_IgniteRddSpark210&tab=buildLog&_focus=379#_state=371>
                 
<https://ci.ignite.apache.org/viewLog.html?buildId=960220&buildTypeId=Ignite20Tests_IgniteRddSpark210&tab=buildLog&_focus=379#_state=371
        
<https://ci.ignite.apache.org/viewLog.html?buildId=960220&buildTypeId=Ignite20Tests_IgniteRddSpark210&tab=buildLog&_focus=379#_state=371>>
                          
<https://ci.ignite.apache.org/viewLog.html?buildId=960220&buildTypeId=Ignite20Tests_IgniteRddSpark210&tab=buildLog&_focus=379#_state=371
        
<https://ci.ignite.apache.org/viewLog.html?buildId=960220&buildTypeId=Ignite20Tests_IgniteRddSpark210&tab=buildLog&_focus=379#_state=371>
                 
<https://ci.ignite.apache.org/viewLog.html?buildId=960220&buildTypeId=Ignite20Tests_IgniteRddSpark210&tab=buildLog&_focus=379#_state=371
        
<https://ci.ignite.apache.org/viewLog.html?buildId=960220&buildTypeId=Ignite20Tests_IgniteRddSpark210&tab=buildLog&_focus=379#_state=371>>>>
                               [3] 
https://github.com/apache/ignite/blob/master/pom.xml#L533 
<https://github.com/apache/ignite/blob/master/pom.xml#L533>
        <https://github.com/apache/ignite/blob/master/pom.xml#L533 
<https://github.com/apache/ignite/blob/master/pom.xml#L533>>
                 <https://github.com/apache/ignite/blob/master/pom.xml#L533 
<https://github.com/apache/ignite/blob/master/pom.xml#L533> 
<https://github.com/apache/ignite/blob/master/pom.xml#L533
        <https://github.com/apache/ignite/blob/master/pom.xml#L533>>> 
<https://github.com/apache/ignite/blob/master/pom.xml#L533 
<https://github.com/apache/ignite/blob/master/pom.xml#L533>

                 <https://github.com/apache/ignite/blob/master/pom.xml#L533 
<https://github.com/apache/ignite/blob/master/pom.xml#L533>>
                          <https://github.com/apache/ignite/blob/master/pom.xml#L533 
<https://github.com/apache/ignite/blob/master/pom.xml#L533>
        <https://github.com/apache/ignite/blob/master/pom.xml#L533 
<https://github.com/apache/ignite/blob/master/pom.xml#L533>>>>
                               [4] 
https://ci.ignite.apache.org/viewLog.html?buildId=960221&buildTypeId=Ignite20Tests_IgniteRdd&tab=buildParameters
        
<https://ci.ignite.apache.org/viewLog.html?buildId=960221&buildTypeId=Ignite20Tests_IgniteRdd&tab=buildParameters>
                 
<https://ci.ignite.apache.org/viewLog.html?buildId=960221&buildTypeId=Ignite20Tests_IgniteRdd&tab=buildParameters
        
<https://ci.ignite.apache.org/viewLog.html?buildId=960221&buildTypeId=Ignite20Tests_IgniteRdd&tab=buildParameters>>
                          
<https://ci.ignite.apache.org/viewLog.html?buildId=960221&buildTypeId=Ignite20Tests_IgniteRdd&tab=buildParameters
        
<https://ci.ignite.apache.org/viewLog.html?buildId=960221&buildTypeId=Ignite20Tests_IgniteRdd&tab=buildParameters>
                 
<https://ci.ignite.apache.org/viewLog.html?buildId=960221&buildTypeId=Ignite20Tests_IgniteRdd&tab=buildParameters
        
<https://ci.ignite.apache.org/viewLog.html?buildId=960221&buildTypeId=Ignite20Tests_IgniteRdd&tab=buildParameters>>>
                               
<https://ci.ignite.apache.org/viewLog.html?buildId=960221&buildTypeId=Ignite20Tests_IgniteRdd&tab=buildParameters
        
<https://ci.ignite.apache.org/viewLog.html?buildId=960221&buildTypeId=Ignite20Tests_IgniteRdd&tab=buildParameters>
                 
<https://ci.ignite.apache.org/viewLog.html?buildId=960221&buildTypeId=Ignite20Tests_IgniteRdd&tab=buildParameters
        
<https://ci.ignite.apache.org/viewLog.html?buildId=960221&buildTypeId=Ignite20Tests_IgniteRdd&tab=buildParameters>>
                          
<https://ci.ignite.apache.org/viewLog.html?buildId=960221&buildTypeId=Ignite20Tests_IgniteRdd&tab=buildParameters
        
<https://ci.ignite.apache.org/viewLog.html?buildId=960221&buildTypeId=Ignite20Tests_IgniteRdd&tab=buildParameters>
                 
<https://ci.ignite.apache.org/viewLog.html?buildId=960221&buildTypeId=Ignite20Tests_IgniteRdd&tab=buildParameters
        
<https://ci.ignite.apache.org/viewLog.html?buildId=960221&buildTypeId=Ignite20Tests_IgniteRdd&tab=buildParameters>>>>
                               [5] 
http://apache-ignite-developers.2346864.n4.nabble.com/Integration-of-Spark-and-Ignite-Prototype-tp22649p23099.html
        
<http://apache-ignite-developers.2346864.n4.nabble.com/Integration-of-Spark-and-Ignite-Prototype-tp22649p23099.html>
                 
<http://apache-ignite-developers.2346864.n4.nabble.com/Integration-of-Spark-and-Ignite-Prototype-tp22649p23099.html
        
<http://apache-ignite-developers.2346864.n4.nabble.com/Integration-of-Spark-and-Ignite-Prototype-tp22649p23099.html>>
                          
<http://apache-ignite-developers.2346864.n4.nabble.com/Integration-of-Spark-and-Ignite-Prototype-tp22649p23099.html
        
<http://apache-ignite-developers.2346864.n4.nabble.com/Integration-of-Spark-and-Ignite-Prototype-tp22649p23099.html>
                 
<http://apache-ignite-developers.2346864.n4.nabble.com/Integration-of-Spark-and-Ignite-Prototype-tp22649p23099.html
        
<http://apache-ignite-developers.2346864.n4.nabble.com/Integration-of-Spark-and-Ignite-Prototype-tp22649p23099.html>>>
                               
<http://apache-ignite-developers.2346864.n4.nabble.com/Integration-of-Spark-and-Ignite-Prototype-tp22649p23099.html
        
<http://apache-ignite-developers.2346864.n4.nabble.com/Integration-of-Spark-and-Ignite-Prototype-tp22649p23099.html>
                 
<http://apache-ignite-developers.2346864.n4.nabble.com/Integration-of-Spark-and-Ignite-Prototype-tp22649p23099.html
        
<http://apache-ignite-developers.2346864.n4.nabble.com/Integration-of-Spark-and-Ignite-Prototype-tp22649p23099.html>>
                          
<http://apache-ignite-developers.2346864.n4.nabble.com/Integration-of-Spark-and-Ignite-Prototype-tp22649p23099.html
        
<http://apache-ignite-developers.2346864.n4.nabble.com/Integration-of-Spark-and-Ignite-Prototype-tp22649p23099.html>
                 
<http://apache-ignite-developers.2346864.n4.nabble.com/Integration-of-Spark-and-Ignite-Prototype-tp22649p23099.html
        
<http://apache-ignite-developers.2346864.n4.nabble.com/Integration-of-Spark-and-Ignite-Prototype-tp22649p23099.html>>>>
                               [6] 
https://ci.ignite.apache.org/viewLog.html?buildId=960220&buildTypeId=Ignite20Tests_IgniteRddSpark210&tab=testsInfo
        
<https://ci.ignite.apache.org/viewLog.html?buildId=960220&buildTypeId=Ignite20Tests_IgniteRddSpark210&tab=testsInfo>
                 
<https://ci.ignite.apache.org/viewLog.html?buildId=960220&buildTypeId=Ignite20Tests_IgniteRddSpark210&tab=testsInfo
        
<https://ci.ignite.apache.org/viewLog.html?buildId=960220&buildTypeId=Ignite20Tests_IgniteRddSpark210&tab=testsInfo>>
                          
<https://ci.ignite.apache.org/viewLog.html?buildId=960220&buildTypeId=Ignite20Tests_IgniteRddSpark210&tab=testsInfo
        
<https://ci.ignite.apache.org/viewLog.html?buildId=960220&buildTypeId=Ignite20Tests_IgniteRddSpark210&tab=testsInfo>
                 
<https://ci.ignite.apache.org/viewLog.html?buildId=960220&buildTypeId=Ignite20Tests_IgniteRddSpark210&tab=testsInfo
        
<https://ci.ignite.apache.org/viewLog.html?buildId=960220&buildTypeId=Ignite20Tests_IgniteRddSpark210&tab=testsInfo>>>
                               
<https://ci.ignite.apache.org/viewLog.html?buildId=960220&buildTypeId=Ignite20Tests_IgniteRddSpark210&tab=testsInfo
        
<https://ci.ignite.apache.org/viewLog.html?buildId=960220&buildTypeId=Ignite20Tests_IgniteRddSpark210&tab=testsInfo>
                 
<https://ci.ignite.apache.org/viewLog.html?buildId=960220&buildTypeId=Ignite20Tests_IgniteRddSpark210&tab=testsInfo
        
<https://ci.ignite.apache.org/viewLog.html?buildId=960220&buildTypeId=Ignite20Tests_IgniteRddSpark210&tab=testsInfo>>
                          
<https://ci.ignite.apache.org/viewLog.html?buildId=960220&buildTypeId=Ignite20Tests_IgniteRddSpark210&tab=testsInfo
        
<https://ci.ignite.apache.org/viewLog.html?buildId=960220&buildTypeId=Ignite20Tests_IgniteRddSpark210&tab=testsInfo>
                 
<https://ci.ignite.apache.org/viewLog.html?buildId=960220&buildTypeId=Ignite20Tests_IgniteRddSpark210&tab=testsInfo
        
<https://ci.ignite.apache.org/viewLog.html?buildId=960220&buildTypeId=Ignite20Tests_IgniteRddSpark210&tab=testsInfo>>>>
                               [7] 
https://github.com/apache/ignite/blob/master/modules/spark/src/test/scala/org/apache/ignite/spark/IgniteRDDSpec.scala
        
<https://github.com/apache/ignite/blob/master/modules/spark/src/test/scala/org/apache/ignite/spark/IgniteRDDSpec.scala>
                 
<https://github.com/apache/ignite/blob/master/modules/spark/src/test/scala/org/apache/ignite/spark/IgniteRDDSpec.scala
        
<https://github.com/apache/ignite/blob/master/modules/spark/src/test/scala/org/apache/ignite/spark/IgniteRDDSpec.scala>>
                          
<https://github.com/apache/ignite/blob/master/modules/spark/src/test/scala/org/apache/ignite/spark/IgniteRDDSpec.scala
        
<https://github.com/apache/ignite/blob/master/modules/spark/src/test/scala/org/apache/ignite/spark/IgniteRDDSpec.scala>
                 
<https://github.com/apache/ignite/blob/master/modules/spark/src/test/scala/org/apache/ignite/spark/IgniteRDDSpec.scala
        
<https://github.com/apache/ignite/blob/master/modules/spark/src/test/scala/org/apache/ignite/spark/IgniteRDDSpec.scala>>>
                               
<https://github.com/apache/ignite/blob/master/modules/spark/src/test/scala/org/apache/ignite/spark/IgniteRDDSpec.scala
        
<https://github.com/apache/ignite/blob/master/modules/spark/src/test/scala/org/apache/ignite/spark/IgniteRDDSpec.scala>
                 
<https://github.com/apache/ignite/blob/master/modules/spark/src/test/scala/org/apache/ignite/spark/IgniteRDDSpec.scala
        
<https://github.com/apache/ignite/blob/master/modules/spark/src/test/scala/org/apache/ignite/spark/IgniteRDDSpec.scala>>
                          
<https://github.com/apache/ignite/blob/master/modules/spark/src/test/scala/org/apache/ignite/spark/IgniteRDDSpec.scala
        
<https://github.com/apache/ignite/blob/master/modules/spark/src/test/scala/org/apache/ignite/spark/IgniteRDDSpec.scala>
                 
<https://github.com/apache/ignite/blob/master/modules/spark/src/test/scala/org/apache/ignite/spark/IgniteRDDSpec.scala
        
<https://github.com/apache/ignite/blob/master/modules/spark/src/test/scala/org/apache/ignite/spark/IgniteRDDSpec.scala>>>>

Re: TC issues. IGNITE-3084. Spark Data Frame API

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